Features of necrotizing pancreatitis with surrounding organizing collection "walled-off pancreatic collection" and stranding, along with thrombosed splenic vein. 

The following are the latest terms according to the updated Atlanta classification to describe fluid collections associated with acute pancreatitis:

• fluid collections associated with interstitial edematous pancreatitis (i.e. minimal or no necrosis)
  • acute peripancreatic fluid collections (APFC): in the first 4 weeks: non-encapsulated peripancreatic fluid collections
  • pseudocysts: develop after 4 weeks; encapsulated peripancreatic or remote fluid collections
• fluid collections associated with necrotizing pancreatitis
  • acute necrotic collections (ANCs): in the first 4 weeks; non-encapsulated heterogeneous non-liquefied material
  • walled-off necrosis (WON or WOPN): develop after 4 weeks; encapsulated heterogeneous non-liquefied material